Chuck.



C. F. WOODFORD & 0. S. ROCKWELL.

CHUCK. APPLICATION F l LED JAN 6. 1915.

1,269,991. Patented Ju ne1-8, 1918.

vIra/01911120was Min/eases Clarence-Merci Woiidfb i'd,

C. F. WOODFORD & O. S. ROCKWELL.

CHUCK.

APPLICATION FILED JAN. 6. mus.

Patented. J \1116 18, 1918.

3 SHEETS-SHEET 2.

Inveni'o 7's Vlfpifmsses CZa renoe E'edena'c IVooqijo rd, 5 m. Q, g om'wanocmwew,

UNITED. STATES PATENT OFFICE.

CLARENCE FREDERIC WOODFORD, OF WINDSOR LOCKS, AND OLIN S. ROCKWELL, OF WAREHOUSE POINT, CONNECTICUT, ASSIGNORS TO E. HORTON & SON COMPANY, OF l WINDSOR LOCKS, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CHUCK.

Specification of Letters Patent. Patented June 18, 1918,

Application filed January 6, 1915. Serial N o. 729.

To all whom it may concern:

Be it known that we, CLARENCE FREDERIC Woonronn and OLIN S. RooKwnLL, both citizens of the United States, and residents, respectively, of Windsor Locks and Warehouse Point, county of Hartford, State of Connecticut, have invented an Improvement in Chucks, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention has for its purpose the improvement of chucks, and its various features will be best understood from the following description of one embodiment there of selected to illustrate the same together with the accompanying drawings, wherein:

Figure 1 is a front elevation, partly broken away;

Fig. 2 is a section taken on the line 22 of Fig. 15

Fig. 3 1s a section, taken on the line 33 of Flg. 1;

Fig. 4 1s an enlarged longitudinal section through a jaw and j aw-carrier; and

Fig. 5 is an end view of the parts shown in Fig. 4.

The chuck body 10 is so constructed as to admit the insertion, at the back, of the back plate 11, said body and back plate being se cured together by the screws 35, and at the same time fastened to the face plate 12 by the bolts 13.

The jaws 14 are provided with grooves 16, which register with tongues 15 on the inside of jaw slots 17 cut in the face of the chuck. The under surface of each 'aw l4 is'circularly concaved and provi ed with screw threads 18 (best shown in Fig. 4) which engage corresponding threads upon the operating screw 19, which fits snugly but rotatably in the smooth bored interior of the j aw-carrier 20.

The jaw-carriers 20 are also slidably nested in the chuck body, and are provided on their under surface with screw threads 21. The jaw-carriers are made closed at their outer ends except for the opening 22, which is provided to permit the insertion of a wrench or other tool into the squared aperture 23 of the jaw-operating screw 19. The inside end of the jaw-carrier is screw threaded in order to receive the threaded breach block 24,'which acts to secure the operating screw 19 within the carrier. The block 24 may be reduced, for a part of its circumference, as shown at 25, in order to permit the free passing thereover of the jaw 14. In order to firmly secure the breach block in place, the screws 26 may be provided, passing through the sides of the Jawcarrier and into suitably threaded openings in the block itself.

The centers of the jaw-operating screws 19 preferably lie below the surfaces of the jaw-carriers 20, since this arrangement gives a firmer thrust bearing for the screws, and results in a stronger, more steady jaw-operating mechanism. As will be seen, the screws 19 may be inserted endwise into the carriers 20, and then secured in place by the blocks 24. p

The teeth 21 on the under surface of the jaw-carriers 20, engage the helically disposed rib of a scroll 27, which is rotatably nested in the chuck between the body 10 and the back plate 11. On the back side of the scroll 27 are provided teeth 28, which engage the teeth of pinions 29 which rotate in suitably shaped bearings in the body and back plate of the chuck.

The pinions 29 may be of any suitable type, but preferably they are of the same type as those illustrated in our application for patent, Serial Number 879,784, filed December 30, 1914, being provided with thrust bearing rings 30 which abut against the back ends of the pinion teeth 31, thus providing a thrust bearing of great strength and a protection to the pinion teeth. The pinions 29 may be turned by inserting a proper implement through any of the openings 32 in the periphery of the chuck body, and into the squared opening 33 sunk in the outside end of the pinion shank 34.

In operation, the rotation of any pinion 29 will cause the rotation of the scroll ring 27, resulting in the radial movement of the jaw-carriers 20 and the jaws 14. Any jaw may be moved relatively to the others by turning any of the j aw-operating screws 19, all as will be readily understood by those skilled in the art.

Having described one illustrative embodiiment of our invention, we claim:

A chuck having radial guides, jaw car- 'riers movable along said guides and means In testimony whereof, We have signed our 10 to actuate said. carriers, said carriers having names to this specification, in the presence of undercut longitudinal bores therein, jaW-entWo subscribing Witnesses.

gaging screws in said bores retained therein GLARENOE FREDERIG WOODFORD by the overhanging portions thereof and OLIN S ROCKWELL projecting above the carriers, the carriers being peripherally flanged about the outer Witnesses:

ends of said bores and having removable RAYMOND A. MORAN, screw retaining means at their inner ends. HENRY L. CUTLER.

Copies of this patent may be obtained 01 five cents each, by addressing the Commissioner of latentl.

Washington, D. 0. 

